Re: FIN_WAIT_[1,2] and LAST_ACK
From: Andre Oppermann (andre_at_freebsd.org)
Date: 04/06/04
- Previous message: Julian Elischer: "Re: FIN_WAIT_[1,2] and LAST_ACK"
- In reply to: Brandon Erhart: "FIN_WAIT_[1,2] and LAST_ACK"
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Date: Tue, 06 Apr 2004 00:02:52 +0200 To: Brandon Erhart <berhart@ErhartGroup.COM>
Brandon Erhart wrote:
>
> Hello everyone,
>
> I am writing a network application that mirrors a given website (such as a
> suped-up "wget"). I use a lot of FDs, and was getting connect() errors when
> I would run out of local_ip:local_port tuples. I lowered the MSL so that
> TIME_WAIT would timeout very quick (yes, I know, this is "bad", but I'm
> going for sheer speed here), and it alleviated the problem a bit.
You should enlarge the local port space especially on 4.9:
sysctl -w net.inet.ip.portrange.hifirst=10000
sysctl -w net.inet.ip.portrange.hilast=65535
Normal is 49152 which give you only 16383 ports to choose from. And
with the number of connections you have you're running of them because
of the TIME_WAIT states.
-- Andre > However, I have run into a new problem. I am getting a good amount of > blocks stuck in FIN_WAIT_1, FIN_WAIT_2 or LAST_ACK that stick around for a > long while. I have been unable to find must information on a timeout for > these states. I came across a small patch that modified tcp_timer.c in > /usr/src/sys/netinet. It changed line #484 (in FreeBSD 4.9-REL) from: > > if (tp->t_state != TCPS_TIME_WAIT && > > to > > if (tp->t_state < FIN_WAIT_2 && > > I also tried changing that to ".. <= FIN_WAIT_2 .." > > However, I still end up with quite a few stuck in FIN_WAIT_1, FIN_WAIT_2 or > LAST_ACK after the program exits (and whilst the program is running of > course). They don't seem to timeout in the same interval that TIME_WAIT does. > > Any ideas? Did I modify the right piece of code? I was told to post here as > you all would more than likely know! > > I am stumped. > > Thank you all in advance, > > Brandon > > _______________________________________________ > freebsd-net@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-net > To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org" _______________________________________________ freebsd-net@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org"
- Previous message: Julian Elischer: "Re: FIN_WAIT_[1,2] and LAST_ACK"
- In reply to: Brandon Erhart: "FIN_WAIT_[1,2] and LAST_ACK"
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